I bought two for my children, I have filled them with songs and they listen for hours, the volume is very high especially for children and it has very good battery life. It is definitely worth the money

Many positives: elegant, beautiful, read the sd immediately a problem though: it does not catch radio, constantly hearing interference and I was in an open space.

Very beautiful, easy menu, immediately recognized the memory card and played the songs. It's perfect for children.

Very good value for money, satisfactory and clear sound, okay battery and doesn't seem cheaply made. I mainly use it with Bluetooth for convenience, as it connects immediately and without any problems.
MP3: I have already tried 2 SD cards, but it doesn't read any of them, even though it seems to detect them. Maybe it needs a Standard one with fewer GB or a different song format. I will try it at some point later, hopefully it's not just a device glitch.
The radio works fine but it's difficult to make the device stop at a station, it constantly searches and it's because of the buttons on the side that are not user-friendly. Basically, the only major issue with these headphones is the terrible menu. And the even worse instructions in English.
Overall, the features are not top-notch (Bluetooth 3.0, no mention of SD card compatibility anywhere), but for 20 euros, it's a decent device.

I have them for over a year, they are worth it, guys, a thousand times over for their money and more.

Awesome sound, clear both in calls and everywhere. Relatively good noise cancellation - I mean the isolation of the environment.